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Rapid decline in forced expiratory volume in 1 second (FEV1) and the development of bronchitic symptoms among new Chinese coal miners.

Authors
Wang-M-L; Wu-ZE; Du-QG; Peng-KL; Li-YD; Li-SK; Han-GH; Petsonk-EL
Source
J Occup Environ Med 2007 Oct; 49(10):1143-1148
NIOSHTIC No.
20032759
Abstract
Objective: To investigate the relationship between the development of bronchitic symptoms and the early rapid decline of forced expiratory volume in 1 second (FEV1). Methods: A two-stage and a mixed model approach were used to analyze data from 260 newly hired Chinese coal miners who completed approximately 5 to 16 health surveys during 3 years. Results: The proportion of miners with onset of bronchitic symptoms was significantly elevated after 11 months of underground mining. Miners with incident symptoms had greater declines in FEV1 compared with those who did not (-65 vs -23 mL/yr, P less than 0.05). At 24 months follow-up, FEV1 had declined an average 235 mL among the 26 miners who developed bronchitic symptoms and smoked, compared with a decline of 96 mL among the 132 nonsmoking miners without symptoms. Conclusions: Among new coal miners, a sharp early decline in FEV1 is associated with the development of bronchitic symptoms.
Keywords
Coal-dust; Coal-miners; Coal-mining; Coal-workers; Underground-miners; Underground-mining; Occupational-exposure; Dust-exposure; Dust-particles; Dusts; Bronchial-asthma; Models; Health-surveys; Smoking; Tobacco-smoke; Lung-function; Pulmonary-system-disorders; Respiratory-system-disorders; Airway-obstruction; Surveillance
Contact
Edward L. Petsonk, MD, FCCP, National Institute for Occupational Safety and Health, Mail Stop H-G900.2, 1095 Willowdale Road, Morgantown, WV 26505
CODEN
JOEMFM
Publication Date
20071001
Document Type
Journal Article
Email Address
elp2@cdc.gov
Fiscal Year
2008
NTIS Accession No.
NTIS Price
Issue of Publication
10
ISSN
1076-2752
NIOSH Division
DRDS
Source Name
Journal of Occupational and Environmental Medicine
State
WV
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